Medical retrieval baskets
First Claim
Patent Images
1. A medical device, comprising:
- a sheath having a proximal end and a distal end;
a basket for removing material from a body, the basket having a distal end, a proximal end, a longitudinal axis, a collapsed position where the basket is enclosed within the sheath, and an expanded position where the basket extends from the distal end of the sheath, andwherein the basket includes at least two struts each comprised of two legs united in a paired configuration, the struts twisting in a spiral configuration about the longitudinal axis of the basket, andwherein the two legs of each strut are permanently connected at multiple points along the longitudinal axis of the basket,wherein the multiple points include at least a first point, a second point, and a third point, wherein the third point is located between the first point and the second point along the longitudinal axis, and the two legs are unconnected between the first point and the third point and between the second point and the third point.
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Abstract
A medical retrieval device includes a basket formed of two or more legs. The basket may be used to retrieve material (e.g., a urinary stone) from a body. The basket opens and closes for encapsulation of a stone. A captured stone may be released from the basket with the basket still in the body by opening the legs. The baskets exhibit shapes and configurations designed to optimize the characteristics of flexibility, ease of material capture, and ease of material release.
18 Citations
29 Claims
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1. A medical device, comprising:
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a sheath having a proximal end and a distal end; a basket for removing material from a body, the basket having a distal end, a proximal end, a longitudinal axis, a collapsed position where the basket is enclosed within the sheath, and an expanded position where the basket extends from the distal end of the sheath, and wherein the basket includes at least two struts each comprised of two legs united in a paired configuration, the struts twisting in a spiral configuration about the longitudinal axis of the basket, and wherein the two legs of each strut are permanently connected at multiple points along the longitudinal axis of the basket, wherein the multiple points include at least a first point, a second point, and a third point, wherein the third point is located between the first point and the second point along the longitudinal axis, and the two legs are unconnected between the first point and the third point and between the second point and the third point. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A medical device, comprising:
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a sheath having a proximal end and a distal end; a basket for removing material from a body, the basket having a distal end, a proximal end, a longitudinal axis, a collapsed position where the basket is enclosed within the sheath, an expanded position where the basket extends from the distal end of the sheath, and at least two struts extending between the distal and proximal basket ends, each of the struts having a first portion extending from the proximal end of the basket and twisting in a first spiral direction around the longitudinal axis, and a second portion extending between the first portion and the distal end of the basket, the second portion twisting in a second spiral direction around the longitudinal axis, the second spiral direction being opposite of the first spiral direction, wherein the basket includes a distal basket portion and a proximal basket portion, the distal basket portion including at least three struts that merge to form two struts in the proximal basket portion, wherein each strut is comprised of two legs united in a paired configuration, wherein the two legs of each strut are permanently connected at multiple points along the longitudinal axis of the basket, wherein the multiple points include at least a first point, a second point, and a third point, wherein the third point is located between the first point and the second point along the longitudinal axis, and the two legs are unconnected between the first point and the third point and between the second point and the third point. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A medical device, comprising:
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a sheath having a proximal end and a distal end; a basket for removing material from a body, the basket having a distal end, a proximal end, a longitudinal axis, a collapsed position where the basket is enclosed within the sheath, and an expanded position where the basket extends from the distal end of the sheath, wherein the basket includes at least one strut having a first portion extending from the proximal end of the basket to an intermediate point between the proximal and distal ends of the basket and twisting in a first spiral direction around the longitudinal axis, and a second portion extending distally from the intermediate point and twisting in a second spiral direction around the longitudinal axis, the second spiral direction being opposite of the first spiral direction, wherein the at least one strut is comprised of two legs united in a paired configuration, wherein the two legs of the at least one strut are permanently connected at multiple points along the longitudinal axis of the basket, wherein the multiple points include at least a first point, a second point, and a third point, wherein the third point is located between the first point and the second point along the longitudinal axis, and the two legs are unconnected between the first point and the third point and between the second point and the third point. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification